
ys{
    background-color:coral;
}

#id1{
    font-family:serif;
    font-weight: 200;
    font-size: 32px;
}

.lei{
    text-align: left;
    text-decoration:overline;
}

a[href="https://www.baidu.com"]{
color:crimson;
}

pad{
    padding-bottom: 50px;
}
bor{
    border-style: dashed;
    border-width: 1px;
}
mar{
    margin-top: 50px;
}